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<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">abs_diff_image</span><span data-if="c" style="display:none;">abs_diff_image</span><span data-if="cpp" style="display:none;">AbsDiffImage</span><span data-if="dotnet" style="display:none;">AbsDiffImage</span><span data-if="python" style="display:none;">abs_diff_image</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">abs_diff_image</span><span data-if="c" style="display:none;">abs_diff_image</span><span data-if="cpp" style="display:none;">AbsDiffImage</span><span data-if="dotnet" style="display:none;">AbsDiffImage</span><span data-if="python" style="display:none;">abs_diff_image</span></code> — 计算两幅图像的绝对差异。</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>abs_diff_image</b>(<a href="#Image1"><i>Image1</i></a>, <a href="#Image2"><i>Image2</i></a> : <a href="#ImageAbsDiff"><i>ImageAbsDiff</i></a> : <a href="#Mult"><i>Mult</i></a> : )</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>abs_diff_image</b>(const Hobject <a href="#Image1"><i>Image1</i></a>, const Hobject <a href="#Image2"><i>Image2</i></a>, Hobject* <a href="#ImageAbsDiff"><i>ImageAbsDiff</i></a>, double <a href="#Mult"><i>Mult</i></a>)</code></p>
<p>
<code>Herror <b>T_abs_diff_image</b>(const Hobject <a href="#Image1"><i>Image1</i></a>, const Hobject <a href="#Image2"><i>Image2</i></a>, Hobject* <a href="#ImageAbsDiff"><i>ImageAbsDiff</i></a>, const Htuple <a href="#Mult"><i>Mult</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>AbsDiffImage</b>(const HObject&amp; <a href="#Image1"><i>Image1</i></a>, const HObject&amp; <a href="#Image2"><i>Image2</i></a>, HObject* <a href="#ImageAbsDiff"><i>ImageAbsDiff</i></a>, const HTuple&amp; <a href="#Mult"><i>Mult</i></a>)</code></p>
<p>
<code><a href="HImage.html">HImage</a> <a href="HImage.html">HImage</a>::<b>AbsDiffImage</b>(const HImage&amp; <a href="#Image2"><i>Image2</i></a>, const HTuple&amp; <a href="#Mult"><i>Mult</i></a>) const</code></p>
<p>
<code><a href="HImage.html">HImage</a> <a href="HImage.html">HImage</a>::<b>AbsDiffImage</b>(const HImage&amp; <a href="#Image2"><i>Image2</i></a>, double <a href="#Mult"><i>Mult</i></a>) const</code></p>
</div>
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<div data-if="dotnet" style="display:none;">
<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>AbsDiffImage</b>(<a href="HObject.html">HObject</a> <a href="#Image1"><i>image1</i></a>, <a href="HObject.html">HObject</a> <a href="#Image2"><i>image2</i></a>, out <a href="HObject.html">HObject</a> <a href="#ImageAbsDiff"><i>imageAbsDiff</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Mult"><i>mult</i></a>)</code></p>
<p>
<code><a href="HImage.html">HImage</a> <a href="HImage.html">HImage</a>.<b>AbsDiffImage</b>(<a href="HImage.html">HImage</a> <a href="#Image2"><i>image2</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Mult"><i>mult</i></a>)</code></p>
<p>
<code><a href="HImage.html">HImage</a> <a href="HImage.html">HImage</a>.<b>AbsDiffImage</b>(<a href="HImage.html">HImage</a> <a href="#Image2"><i>image2</i></a>, double <a href="#Mult"><i>mult</i></a>)</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>abs_diff_image</b>(<a href="#Image1"><i>image_1</i></a>: HObject, <a href="#Image2"><i>image_2</i></a>: HObject, <a href="#Mult"><i>mult</i></a>: Union[int, float]) -&gt; HObject</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p><code><span data-if="hdevelop" style="display:inline">abs_diff_image</span><span data-if="c" style="display:none">abs_diff_image</span><span data-if="cpp" style="display:none">AbsDiffImage</span><span data-if="com" style="display:none">AbsDiffImage</span><span data-if="dotnet" style="display:none">AbsDiffImage</span><span data-if="python" style="display:none">abs_diff_image</span></code> calculates the absolute difference between
two images.  The gray values g' of the output image
<a href="#ImageAbsDiff"><i><code><span data-if="hdevelop" style="display:inline">ImageAbsDiff</span><span data-if="c" style="display:none">ImageAbsDiff</span><span data-if="cpp" style="display:none">ImageAbsDiff</span><span data-if="com" style="display:none">ImageAbsDiff</span><span data-if="dotnet" style="display:none">imageAbsDiff</span><span data-if="python" style="display:none">image_abs_diff</span></code></i></a> are calculated from the gray values (g1,g2)
of the input images (<a href="#Image1"><i><code><span data-if="hdevelop" style="display:inline">Image1</span><span data-if="c" style="display:none">Image1</span><span data-if="cpp" style="display:none">Image1</span><span data-if="com" style="display:none">Image1</span><span data-if="dotnet" style="display:none">image1</span><span data-if="python" style="display:none">image_1</span></code></i></a> and <a href="#Image2"><i><code><span data-if="hdevelop" style="display:inline">Image2</span><span data-if="c" style="display:none">Image2</span><span data-if="cpp" style="display:none">Image2</span><span data-if="com" style="display:none">Image2</span><span data-if="dotnet" style="display:none">image2</span><span data-if="python" style="display:none">image_2</span></code></i></a>) as
follows:
<span class="pre">
                g' = |(g1 - g2)| * Mult
</span>
If an overflow or an underflow occurs the resulting values are
clipped.
</p>
<p>Several images can be processed in one call.  In this case, both
input parameters contain the same number of images which are then
processed in pairs.  An output image is generated for every pair.
</p>
<p>Please note that the runtime of 该算子 depends on the value of
<a href="#Mult"><i><code><span data-if="hdevelop" style="display:inline">Mult</span><span data-if="c" style="display:none">Mult</span><span data-if="cpp" style="display:none">Mult</span><span data-if="com" style="display:none">Mult</span><span data-if="dotnet" style="display:none">mult</span><span data-if="python" style="display:none">mult</span></code></i></a>.  For <a href="#Mult"><i><code><span data-if="hdevelop" style="display:inline">Mult</span><span data-if="c" style="display:none">Mult</span><span data-if="cpp" style="display:none">Mult</span><span data-if="com" style="display:none">Mult</span><span data-if="dotnet" style="display:none">mult</span><span data-if="python" style="display:none">mult</span></code></i></a> = 1, a special optimization is
used.  Since values of <a href="#Mult"><i><code><span data-if="hdevelop" style="display:inline">Mult</span><span data-if="c" style="display:none">Mult</span><span data-if="cpp" style="display:none">Mult</span><span data-if="com" style="display:none">Mult</span><span data-if="dotnet" style="display:none">mult</span><span data-if="python" style="display:none">mult</span></code></i></a> different from 1 cannot yield
additional information, <a href="#Mult"><i><code><span data-if="hdevelop" style="display:inline">Mult</span><span data-if="c" style="display:none">Mult</span><span data-if="cpp" style="display:none">Mult</span><span data-if="com" style="display:none">Mult</span><span data-if="dotnet" style="display:none">mult</span><span data-if="python" style="display:none">mult</span></code></i></a> = 1 should be used in
applications.  All other values of <a href="#Mult"><i><code><span data-if="hdevelop" style="display:inline">Mult</span><span data-if="c" style="display:none">Mult</span><span data-if="cpp" style="display:none">Mult</span><span data-if="com" style="display:none">Mult</span><span data-if="dotnet" style="display:none">mult</span><span data-if="python" style="display:none">mult</span></code></i></a> should only be used
for visualization purposes.  Additionally, for byte, int1, int2, and
uint2 images special optimizations are implemented for
<a href="#Mult"><i><code><span data-if="hdevelop" style="display:inline">Mult</span><span data-if="c" style="display:none">Mult</span><span data-if="cpp" style="display:none">Mult</span><span data-if="com" style="display:none">Mult</span><span data-if="dotnet" style="display:none">mult</span><span data-if="python" style="display:none">mult</span></code></i></a> = 1 that use SIMD technology.  The actual
application of these special optimizations is controlled by the
system parameter <i><span data-if="hdevelop" style="display:inline">'mmx_enable'</span><span data-if="c" style="display:none">"mmx_enable"</span><span data-if="cpp" style="display:none">"mmx_enable"</span><span data-if="com" style="display:none">"mmx_enable"</span><span data-if="dotnet" style="display:none">"mmx_enable"</span><span data-if="python" style="display:none">"mmx_enable"</span></i> (see <a href="set_system.html"><code><span data-if="hdevelop" style="display:inline">set_system</span><span data-if="c" style="display:none">set_system</span><span data-if="cpp" style="display:none">SetSystem</span><span data-if="com" style="display:none">SetSystem</span><span data-if="dotnet" style="display:none">SetSystem</span><span data-if="python" style="display:none">set_system</span></code></a>).
If <i><span data-if="hdevelop" style="display:inline">'mmx_enable'</span><span data-if="c" style="display:none">"mmx_enable"</span><span data-if="cpp" style="display:none">"mmx_enable"</span><span data-if="com" style="display:none">"mmx_enable"</span><span data-if="dotnet" style="display:none">"mmx_enable"</span><span data-if="python" style="display:none">"mmx_enable"</span></i> is set to <i><span data-if="hdevelop" style="display:inline">'true'</span><span data-if="c" style="display:none">"true"</span><span data-if="cpp" style="display:none">"true"</span><span data-if="com" style="display:none">"true"</span><span data-if="dotnet" style="display:none">"true"</span><span data-if="python" style="display:none">"true"</span></i> (and the SIMD
instruction set is available), the internal calculations are
performed using SIMD technology.
</p>
<p><code><span data-if="hdevelop" style="display:inline">abs_diff_image</span><span data-if="c" style="display:none">abs_diff_image</span><span data-if="cpp" style="display:none">AbsDiffImage</span><span data-if="com" style="display:none">AbsDiffImage</span><span data-if="dotnet" style="display:none">AbsDiffImage</span><span data-if="python" style="display:none">abs_diff_image</span></code> can be executed on an OpenCL device for byte, int1,
int2, uint2, int4, and real images. However, since for OpenCL 1.0 only
single precision floating point is supported for all devices, and not all
rounding modes are supported, the OpenCL implementation can produce slightly
different results from the scalar or SIMD implementations.
</p>
<h2 id="sec_attention">注意</h2>
<p>Note that the acceleration gained by SIMD technology is highest on large,
compact input regions. However, in rare cases, the execution of
<code><span data-if="hdevelop" style="display:inline">abs_diff_image</span><span data-if="c" style="display:none">abs_diff_image</span><span data-if="cpp" style="display:none">AbsDiffImage</span><span data-if="com" style="display:none">AbsDiffImage</span><span data-if="dotnet" style="display:none">AbsDiffImage</span><span data-if="python" style="display:none">abs_diff_image</span></code> might take significantly longer with SIMD technology
than without, depending on the input region and the capabilities of
the hardware. In these cases, the use of SIMD
technology can be avoided by <a href="set_system.html"><code><span data-if="hdevelop" style="display:inline">set_system(::'mmx_enable','false':)</span><span data-if="c" style="display:none">set_system("mmx_enable","false")</span><span data-if="cpp" style="display:none">SetSystem("mmx_enable","false")</span><span data-if="com" style="display:none">SetSystem("mmx_enable","false")</span><span data-if="dotnet" style="display:none">SetSystem("mmx_enable","false")</span><span data-if="python" style="display:none">set_system("mmx_enable","false")</span></code></a>.
</p>
<h2 id="sec_execution">运行信息</h2>
<ul>
    
      <li>支持OpenCL计算设备。</li>
    
  <li>多线程类型:可重入(与非独占操作符并行运行)。</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  
    <li>在元组级别自动并行化。</li>
    <li>在图像通道级别自动并行化。</li>
    <li>Automatically parallelized on  domain level.</li>
  
</ul>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="Image1" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Image1</span><span data-if="c" style="display:none">Image1</span><span data-if="cpp" style="display:none">Image1</span><span data-if="com" style="display:none">Image1</span><span data-if="dotnet" style="display:none">image1</span><span data-if="python" style="display:none">image_1</span></code></b> (input_object)  </span><span>(multichannel-)image(-array) <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="c" style="display:none">Hobject</span> (byte* / int1* / int2* / uint2* / int4* / int8 / real*)<i> *allowed for compute devices</i></span>
</div>
<p class="pardesc">Input image 1.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Image2" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Image2</span><span data-if="c" style="display:none">Image2</span><span data-if="cpp" style="display:none">Image2</span><span data-if="com" style="display:none">Image2</span><span data-if="dotnet" style="display:none">image2</span><span data-if="python" style="display:none">image_2</span></code></b> (input_object)  </span><span>(multichannel-)image(-array) <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="c" style="display:none">Hobject</span> (byte* / int1* / int2* / uint2* / int4* / int8 / real*)<i> *allowed for compute devices</i></span>
</div>
<p class="pardesc">Input image 2.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="ImageAbsDiff" class="parname"><b><code><span data-if="hdevelop" style="display:inline">ImageAbsDiff</span><span data-if="c" style="display:none">ImageAbsDiff</span><span data-if="cpp" style="display:none">ImageAbsDiff</span><span data-if="com" style="display:none">ImageAbsDiff</span><span data-if="dotnet" style="display:none">imageAbsDiff</span><span data-if="python" style="display:none">image_abs_diff</span></code></b> (output_object)  </span><span>(multichannel-)image(-array) <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="c" style="display:none">Hobject *</span> (byte / int1 / int2 / uint2 / int4 / int8 / real)</span>
</div>
<p class="pardesc">Absolute value of the difference of the input images.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Mult" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Mult</span><span data-if="c" style="display:none">Mult</span><span data-if="cpp" style="display:none">Mult</span><span data-if="com" style="display:none">Mult</span><span data-if="dotnet" style="display:none">mult</span><span data-if="python" style="display:none">mult</span></code></b> (input_control)  </span><span>number <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">Union[int, float]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real / </span><span data-if="hdevelop" style="display:inline">integer)</span><span data-if="dotnet" style="display:none"> (<i>double</i> / </span><span data-if="dotnet" style="display:none">int / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>double</i> / </span><span data-if="cpp" style="display:none">Hlong)</span><span data-if="c" style="display:none"> (<i>double</i> / </span><span data-if="c" style="display:none">Hlong)</span></span>
</div>
<p class="pardesc">Scale factor.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>1.0</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span>1.0, 2.0, 3.0, 4.0</p>
<p class="pardesc"><span class="parcat">Restriction:
      </span><code>Mult &gt; 0</code></p>
</div>
<h2 id="sec_result">结果</h2>
<p>该算子 <code><span data-if="hdevelop" style="display:inline">abs_diff_image</span><span data-if="c" style="display:none">abs_diff_image</span><span data-if="cpp" style="display:none">AbsDiffImage</span><span data-if="com" style="display:none">AbsDiffImage</span><span data-if="dotnet" style="display:none">AbsDiffImage</span><span data-if="python" style="display:none">abs_diff_image</span></code> 返回值 <TT>2</TT> (
      <TT>H_MSG_TRUE</TT>)
     if the
parameters are correct.  The behavior in case of empty input (no
input images available) is set via 该算子
<a href="set_system.html"><code><span data-if="hdevelop" style="display:inline">set_system(::'no_object_result',&lt;Result&gt;:)</span><span data-if="c" style="display:none">set_system("no_object_result",&lt;Result&gt;)</span><span data-if="cpp" style="display:none">SetSystem("no_object_result",&lt;Result&gt;)</span><span data-if="com" style="display:none">SetSystem("no_object_result",&lt;Result&gt;)</span><span data-if="dotnet" style="display:none">SetSystem("no_object_result",&lt;Result&gt;)</span><span data-if="python" style="display:none">set_system("no_object_result",&lt;Result&gt;)</span></code></a>.  If necessary an
exception is raised.</p>
<h2 id="sec_successors">可能的后置算子</h2>
<p>
<code><a href="threshold.html"><span data-if="hdevelop" style="display:inline">threshold</span><span data-if="c" style="display:none">threshold</span><span data-if="cpp" style="display:none">Threshold</span><span data-if="com" style="display:none">Threshold</span><span data-if="dotnet" style="display:none">Threshold</span><span data-if="python" style="display:none">threshold</span></a></code>
</p>
<h2 id="sec_alternatives">可替代算子</h2>
<p>
<code><a href="sub_image.html"><span data-if="hdevelop" style="display:inline">sub_image</span><span data-if="c" style="display:none">sub_image</span><span data-if="cpp" style="display:none">SubImage</span><span data-if="com" style="display:none">SubImage</span><span data-if="dotnet" style="display:none">SubImage</span><span data-if="python" style="display:none">sub_image</span></a></code>
</p>
<h2 id="sec_see">参考其它</h2>
<p>
<code><a href="add_image.html"><span data-if="hdevelop" style="display:inline">add_image</span><span data-if="c" style="display:none">add_image</span><span data-if="cpp" style="display:none">AddImage</span><span data-if="com" style="display:none">AddImage</span><span data-if="dotnet" style="display:none">AddImage</span><span data-if="python" style="display:none">add_image</span></a></code>, 
<code><a href="scale_image.html"><span data-if="hdevelop" style="display:inline">scale_image</span><span data-if="c" style="display:none">scale_image</span><span data-if="cpp" style="display:none">ScaleImage</span><span data-if="com" style="display:none">ScaleImage</span><span data-if="dotnet" style="display:none">ScaleImage</span><span data-if="python" style="display:none">scale_image</span></a></code>, 
<code><a href="dyn_threshold.html"><span data-if="hdevelop" style="display:inline">dyn_threshold</span><span data-if="c" style="display:none">dyn_threshold</span><span data-if="cpp" style="display:none">DynThreshold</span><span data-if="com" style="display:none">DynThreshold</span><span data-if="dotnet" style="display:none">DynThreshold</span><span data-if="python" style="display:none">dyn_threshold</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
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